Products

DESCRIPTION

Basic Info.

Model NO.	M2
Composition	Ferrous Steel Scrap
Technique	Forged
Shape	Plate
Surface Treatment	Polished
Special Use	High-strength Steel Plate, Wear Resistant Steel, Silicon Steel, Cold Heading Steel, Free Cutting Steel, Mold Steel
Application	Die Steel Bar
Transport Package	Wooden and Bulk
Specification	6-400mm
Trademark	Smooth
Origin	China
HS Code	72281090
Production Capacity	5000 Ton/Year

Product Description

High speed steels (often abbreviated HSS) are ferrous based alloys of the Fe-C-X multicomponent system where X represents a group of alloying elements comprising mainly Cr, W or Mo, V, and Co. These steels are mainly used for cutting tools, since they are characterized by their capacity to retain a high level of hardness while cutting metals at high speed. Generally, the X component is present in excess of 7%, along with more than 0.60% carbon.

Historically, the first high speed steels were the tungsten base type developed by Robert Mushet in the UK and F.W.Taylor in the USA toward the end of the XIX century. In 1904 the addition of vanadium was patented by the Crucible steel company, leading finally to today's best known grade, 18/4/1 (18%W, 4%Cr, 1% V) The first record of the use of cobalt in high speed steels was in Germany 1912. Later, around 1930, molybdenum-bearing alloys were being introduced in the USA.

High-speed steels are divided into three groups:

(a) Those bearing the symbol T where tungsten is the major alloying element; (b) Those bearing the symbol M indicating that molybdenum are the principal alloying element; (c) A group of more highly alloyed steels that is capable of attaining unusually high hardness values.